4389540 has 48 divisors (see below), whose sum is σ = 12398400. Its totient is φ = 1160320.

The previous prime is 4389533. The next prime is 4389547. The reversal of 4389540 is 459834.

4389540 = T₄₁₉ + T₄₂₀ + ... + T₄₆₃.

It is an interprime number because it is at equal distance from previous prime (4389533) and next prime (4389547).

It is a super-2 number, since 2×4389540² = 38536122823200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4389547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8695 + ... + 9185.

It is an arithmetic number, because the mean of its divisors is an integer number (258300).

Almost surely, 2^4389540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4389540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6199200).

4389540 is an abundant number, since it is smaller than the sum of its proper divisors (8008860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4389540 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (4389539) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (650).

4389540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 4389540 is about 2095.1229080892. The cubic root of 4389540 is about 163.7343010803.

The spelling of 4389540 in words is "four million, three hundred eighty-nine thousand, five hundred forty".